In the code below, which lines include uses of a copy constructor?
01: int strangeStuff (string q); 02: 03: string oddStuff (const string& s) 04: { 05: int k; 06: string t (s); 07: string w = s + 'a'; 08: t = w + 'b'; 09: k = strangeStuff (t); 10: return t.substr(k); 11: }

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